The chromosomes as thread like structures in nucleus was first described by

  • A

    Mendel

  • B

    Strasburger

  • C

    Darwin

  • D

    Levitzky

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Transcription means synthesis of

Sometimes cattle or even human beings give birth to their young ones that are having extremely different sets of organs like limbs/position of eye(s) etc. Comment.

During $DNA$ replication, Okazaki fragments areused to elongate

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The chemical knives of $DNA$ are

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In the construction of chromosome maps, the evidence is derived mainly from